JP2002103862A - Card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-layer sheet for a card which has a self-fusion property and heat resistance and is stable in quality. SOLUTION: In the card, a multi-layer sheet in which a fusion layer of a copolyester in which 10-70 mol% of the ethylene glycol component of polyethylene terephthalate is replaced with cyclohexane dimethanol and heat resistant layer of polycarbonate are laminated is arranged as an over sheet on a core sheet of a resin composition in which 0-25 pts.wt. of an inorganic filler and 0-15 pts.wt. of an elastomer are incorporated into 100 pts.wt. of a resin comprising 70-100 pts.wt. of a copolyester in which 10-70 mol% of the ethylene glycol component of polyethylene terephthalate is replaced with cyclohexane dimethanol and 30-0 pts.wt. of polycarbonate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card such as an IC card or a magnetic stripe card which is produced by laminating a core sheet and an oversheet and has an IC chip or the like mounted therein.

[0002]

2. Description of the Related Art Generally, a card material is composed of a white colored central layer called a core sheet and a transparent oversheet laminated on the surface of the core sheet and covered as a pair on the back surface of the card. You. For the fusion of the laminated surfaces of the core sheet and the oversheet, dry lamination via heat fusion or press fusion using a heat fusion adhesive is used. In general, vinyl chloride sheets have been used for these card sheets. However, in recent years, movements to avoid the use of polyvinyl chloride resin due to the problem of incineration have begun to be seen. As an alternative to the polyvinyl chloride resin, polyethylene terephthalate resin, which is an olefin resin, and copolyester resin obtained by substituting the ethylene glycol component of polyethylene terephthalate resin with cyclohexane dimethanol, are rapidly becoming available on the market. I have. However, polyethylene terephthalate resin has poor heat-sealing properties and requires press-sealing using a heat-sealing adhesive. Therefore, when fusing with a core sheet on which an IC chip or the like is mounted, there is an adverse effect on the IC chip. There is a risk that it will. In addition, the man-hour and cost for applying the heat-sealing adhesive to the oversheet are increased. Further, the copolymerized polyester resin obtained by substituting the ethylene glycol component of the polyethylene terephthalate resin with cyclohexane dimethanol has insufficient heat resistance and has a high temperature (70%).
(° C).

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a card having a self-fusing property and heat resistance, and having a stable quality at a low cost.

[0004]

Means for Solving the Problems The present inventors have conducted intensive searches to solve the above-mentioned problems, and as a result, have found that the problems can be solved by using a multilayer sheet having a fusion layer and a heat-resistant layer. That is, the present invention relates to 70 to 100 parts by weight of a copolymerized polyester obtained by substituting 10 to 70 mol% of an ethylene glycol component of a polyethylene terephthalate resin with cyclohexane dimethanol, and a polycarbonate resin 30.
0 to 100 parts by weight of resin consisting of 0 parts by weight of inorganic filler 0
25 parts by weight and a core sheet comprising a resin composition containing 0 to 15 parts by weight of a rubber elastic body, 10 to 70 parts of the ethylene glycol component of the polyethylene terephthalate resin.
This is a card using a multilayer sheet as an oversheet, characterized by laminating a fusion layer, which is a copolymerized polyester in which mol% is replaced with cyclohexanedimethanol, and a heat-resistant layer made of a polycarbonate resin. Preferably, the thickness composition ratio of the fusion layer and the heat-resistant layer is from 5:95 to
This is a card in which a 50:50 multilayer sheet having a heat-resistant layer thickness of 50 microns or more is used as an oversheet.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The copolymerized polyester resin used in the present invention is a polyethylene terephthalate resin obtained by substituting 10 to 70 mol% of an ethylene glycol component with cyclohexanedimethanol. When the substitution amount is less than 10 mol%, the heat-sealing property is inferior, and the elastic modulus of the fused sheet is reduced. This is because the polyethylene terephthalate resin is a crystalline resin, so that the recrystallization of the sheet proceeds during cooling after fusing, whereby the heat-fusing property is lost and the elastic modulus of the sheet decreases. Conversely, when the substitution amount of the ethylene glycol component exceeds 70 mol%, the elastic modulus of the copolymerized polyester resin decreases, and the heat fusibility decreases. This is because when the substitution amount of the copolymerized polyester resin increases, recrystallization proceeds quickly, and the heat-fusing property is lost. That is,
By substituting 10 to 70 mol% of the ethylene glycol component with cyclohexane dimethanol, the copolymerized polyester resin becomes a non-crystalline resin and has a heat-fusing property,
The elastic modulus of the sheet does not decrease. Therefore, the replacement amount of the ethylene glycol component with cyclohexanedimethanol is preferably 10 to 70 mol%, and more preferably 20 to 35 mol%.

The polycarbonate resin used in the present invention is a polymer obtained by a phosgene method of reacting various dihydroxydiaryl compounds with phosgene or a transesterification method of reacting a dihydroxydiaryl compound with a carbonate such as diphenyl carbonate. is there.

As the above dihydroxydiaryl compounds, bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, and 2,2-bis (4-hydroxyphenyl) are used in addition to bisphenol A.
Butane, 2,2-bis (4-hydroxyphenyl) octane, bis (4-hydroxyphenyl) phenylmethane, 2,2-bis (4-hydroxyphenyl-3-methylphenyl) propane, 1,1-bis (4 Bis (hydroxyaryl) alkanes such as -hydroxy-3-tert-butylphenyl) propane, 1,1-bis (4-hydroxyphenyl) cyclopentane, 1,1-bis (4
Bis (hydroxyaryl) cycloalkanes such as -hydroxyphenyl) cyclohexane, 4,4'-
Dihydroxydiaryl ethers such as dihydroxydiphenylether, 4,4'-dihydroxy-3,3'-dimethyldiphenylether, 4,4'-dihydroxydiphenylsulfide, and 4,4'-dihydroxy-3,3'-dimethyldiphenylsulfide; Dihydroxydiaryl sulfoxides, such as 4,4'-dihydroxydiphenyl sulfoxide, and 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfoxide, 4,4'-
Examples thereof include dihydroxydiaryl sulfones such as dihydroxydiphenyl sulfone and 4,4′-dihydroxy-3,3′-dimethyldiphenyl sulfone, and these may be used alone or in combination of two or more.

The viscosity-average molecular weight of the polycarbonate resin used in the present invention is not particularly limited.
Normally from 10,000 to 100,000 from strength, heat resistance,
Preferably it is 15000-35000. In producing such a polycarbonate resin, a molecular weight regulator, a catalyst and the like may be added as necessary. The thickness of the heat-resistant layer of the multilayer sheet of the present invention is preferably 50 microns or more. When the thickness is less than 50 microns, the heat resistance is insufficient and the card is bent.

[0009] The multilayer sheet of the present invention has a two-layer structure of a fusion layer and a heat-resistant layer. The thickness composition ratio of the fusion layer and the heat-resistant layer is
The range of 5:95 to 50:50 is preferred. If the ratio of the fusion layer is less than 5, the fusibility decreases, and if it exceeds 50, the heat resistance decreases.

The core sheet of the present invention is a resin comprising 70 to 100 parts by weight of a copolyester obtained by substituting 10 to 70 mol% of an ethylene glycol component of a polyethylene terephthalate resin with cyclohexane dimethanol and 30 to 0 parts by weight of a polycarbonate resin. With respect to 100 parts by weight of the composition, 0 to 25 parts by weight of an inorganic filler, 0 to 1 parts of a rubbery elastic body
It is a resin composition containing 5 parts by weight. If the blending amount of the polycarbonate resin exceeds 30 parts by weight, the rigidity after the card is made large and the warp of the card after the embossing becomes large, which is not preferable. 25 inorganic fillers
If the amount is more than the weight part, the compatibility with the resin is deteriorated, the impact strength is reduced, and the card becomes brittle. When the amount of the rubber elastic body exceeds 15 parts by weight, heat resistance is undesirably reduced.

The inorganic filler used in the present invention includes talc, mica, calcium carbonate, titanium oxide and the like. Among them, talc having an average particle size of 0.5 to 50 μm is preferable.

The rubbery elastic material used in the present invention includes acrylic polymers and methacrylic polymers mainly composed of alkyl acrylate and alkyl methacrylate,
Examples thereof include one or two or more copolymers of a diene-based polymer mainly containing a conjugated diene such as butadiene and isoprene, and a silicone-based polymer mainly containing polyorganosiloxane. Examples of the vinyl monomer include aromatic vinyl compounds such as styrene and α-methylstyrene, (meth) acrylates such as methyl (meth) acrylate and ethyl (meth) acrylate, and cyanates such as acrylonitrile. And vinyl chloride compounds. Such a rubber-like elastic body is methyl methacrylate.
There are known butyl acrylate / styrene resin (hereinafter abbreviated as MAS resin), methyl methacrylate / butadiene / styrene resin (hereinafter abbreviated as MBS resin), butyl acrylate / isoprene / styrene resin (hereinafter abbreviated as MAIS resin) and the like. Can be used.
Particularly, MBS resin is preferable.

Examples of the rubbery elastic body other than those described above include, for example, butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene-styrene, isobutylene-isoprene rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, acrylonitrile-butadiene rubber, styrene -Butadiene-styrene rubber, hydride of styrene-butadiene rubber, styrene-isoprene-
Styrene rubber and hydride of styrene-isoprene rubber can be exemplified.

These rubbery elastic bodies may be used alone or in combination of two or more.

The multilayer sheet and the core sheet of the present invention include:
Additives commonly used as desired, such as stabilizers, lubricants, reinforcing agents, processing aids, pigments, antistatic agents, antioxidants, neutralizing agents, ultraviolet absorbers, dispersants, thickeners, and other inorganics Fillers and the like, or other synthetic resins can also be included.

In order to process the multilayer sheet and the core sheet of the present invention into a sheet, a conventional calendering method is used.
There are an extrusion method, a pressing method, a casting method, and the like, but there is no particular limitation here.

[0017]

EXAMPLES The present invention will be described below by way of examples, which are merely examples, and the present invention is not limited to these examples. << Preparation of Oversheet >> The extruding method was applied to the fusion layer A and the heat-resistant layer B shown in Table 1 at the composition ratios shown in Table 2.
A multilayer sheet was created. << Preparation of Core Sheet >> After pellets having the composition shown in Table 3 were prepared, they were extruded into a sheet. The thickness of the sheet is 50
It was set to 0 μm. << Examples and Comparative Examples >> Using the prepared oversheet and core sheet, tests of the fusing property and heat resistance were performed. Table 4 shows the results. Various evaluations were performed based on the following. (1) Fusing property: A copolymer polyester resin core sheet obtained by substituting 30 mol% of an ethylene glycol component of a polyethylene terephthalate resin with cyclohexane dimethanol and an oversheet prepared at a ratio of Table 4 at 150 ° C.
After pressing for 10 minutes, a cut was made and it was confirmed whether or not the two sheets were peeled off. ○: Sheet completely fused △: Sheet partially peeled but usable level ×: Sheet completely peeled (2) Heat resistance test: 70 ° C. oven We leaned the sheet and checked whether the sheet flexed. ：: Undeflected △: Slightly deflected but usable level ×: Completely deflected

The symbols in the table are as follows. (1) PETG resin-1: A copolymerized polyester resin obtained by substituting 30 mol% of an ethylene glycol component in a polyethylene terephthalate resin with cyclohexanedimethanol. (Tg = 69 ° C.) (2) PETG resin-2: A copolymerized polyester resin in which 5 mol% of an ethylene glycol component in a polyethylene terephthalate resin is substituted with cyclohexanedimethanol. (Tg = 85 ° C.) (3) PETG resin-3: A copolymerized polyester resin in which 80 mol% of an ethylene glycol component in a polyethylene terephthalate resin is substituted with cyclohexanedimethanol. (Tg = 88 ° C.) (4) PC resin-1: polycarbonate resin (Tg = 1
(20 ° C.) (5) PC resin-2: polycarbonate resin (Tg = 1)
(35 ° C) (6) Talc: average particle size 2.75 (MW HS-
T Hayashi Kasei Co., Ltd.) (7) Rubber-like elastic material: MBS resin (B-56, manufactured by Kanegafuchi Chemical)

[0019]

[Table 1]

[0020]

[Table 2]

[0021]

[Table 3]

[0022]

[Table 4]

[0023]

According to the polyester resin sheet of the present invention, it is possible to obtain a low-cost, stable card of high quality without using an adhesive or an adhesive layer.

Claims (3)

[Claims] 1. A copolymer polyester obtained by substituting 10 to 70 mol% of an ethylene glycol component of a polyethylene terephthalate resin with cyclohexanedimethanol.
100 parts by weight of a resin consisting of 100 parts by weight and 30 to 0 parts by weight of a polycarbonate resin, 0 to 25 parts by weight of an inorganic filler,
A copolymer polyester obtained by substituting 10 to 70 mol% of an ethylene glycol component of a polyethylene terephthalate resin with cyclohexane dimethanol to a core sheet made of a resin composition containing 0 to 15 parts by weight of a rubber elastic body. A card using a multilayer sheet formed by laminating a heat-resistant layer, which is a polycarbonate resin, as an oversheet. 2. The card according to claim 1, wherein the thickness constituting ratio of the fusion layer and the heat-resistant layer of the multilayer sheet is from 5:95 to 50:50. 3. The card according to claim 1, wherein the heat-resistant layer of the multilayer sheet has a thickness of 50 μm or more.